US Bridges

Or 58 (hwy 018) over Willamette River

Fair

Lane County, Oregon · 018 MI W Oakridge · Structure no. 07894 018 03324

Built
1955
70 years old
Condition
Fair
inspected April 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
593 ft
3 main spans
Daily traffic
6,321
2022 count
Owner
State
State Highway Agency

About this bridge

Or 58 (hwy 018) over Willamette River is a steel continuous girder and floorbeam system carrying Or 58 (hwy 018) over Willamette River in Lane County, Oregon. It was built in 1955, so it is 70 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,321 vehicles a day, roughly 12% of them trucks, projected to reach 6,400 by 2042. The structure is 593 ft (180.7 m) long and 36 ft wide. If it were closed, the detour would be 90.7 mi (146 km).

Location

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CarriesOr 58 (hwy 018)
CrossesWillamette River
Location018 MI W Oakridge
RouteState Highway 58
CountyLane County
StateOregon
Coordinates43.74698, -122.51079
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHS 20
Structure length593 ft (180.7 m)
Longest span160 ft (48.8 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,321 (2022)
Projected traffic6,400 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed90.7 mi (146 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 58 (hwy 018) over Willamette River built?

It was built in 1955, making it 70 years old in 2025.

What condition is Or 58 (hwy 018) over Willamette River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Or 58 (hwy 018) over Willamette River carry?

About 6,321 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Or 58 (hwy 018) over Willamette River?

The structure is 593 ft (180.7 m) long with a longest span of 160 ft (48.8 m) and a deck 36 ft wide.

Who owns Or 58 (hwy 018) over Willamette River?

It is owned by the State Highway Agency.